设f(x)在(-∞，0]上连续，且满足，求f(x)及其极小值。

第二卷（非选择题，共两大题，35分）
第四部分任务型阅读（共10小题，每小题1分，满分10分）
请认真阅读下列短文, 并根据所读内容在文章后表格中的空格里填入一个最恰当的单词。注意: 每个空格只填1个单词。请将答案写在答题纸上相应题号的横线上。
The Internet is making the world smaller and changing every aspect of our lives. The impact of this, in my opinion, will be strongly felt in the field of education. There are three reasons for this.
First, the Internet provides equal opportunities for all students, as long as they can get access to it. In the traditional form of education, students who get higher marks in examinations may enter a good school, and those who do not, have to enter a relatively less good one. With the Internet, every student is provided with access to the same educational materials, so they have equal opportunities to improve themselves. In that case, the general quality of education will be highly improved in our country.
Second, the Internet presents a challenge to teachers. Traditionally, teachers have controlled education. With the Internet, a student may choose any teacher’s instruction as he wishes. Faced with this, a teacher is likely to try his best to improve his instruction to be attactive and this will in turn improve the educational quality of our country.
Last but not least, the Internet makes education more convenient for students. A student can learn at any time he likes and, at the same time, he can save the money spent on tuition and board. All of these may lead to a revolution in education.
It is true that the Internet may still remain out of the reach of some people and maybe less amicable (友好的) than human teachers. But the point is that the Internet is sure to accelerate the development of education in our country.

Theme	The Internet is strongly affecting 71. _________.
72. _________ for this	1) All students are 73. _________ with equal opportunities by the Internet, as long as they can have 74. _________ to the Internet.	In this way, our country’s education will be of high 78. _________.
	2) With the Internet, education becomes a little bit 75. _________ to teachers. Teachers have to try to improve their instruction to 76. _________ more students to his classes.
	3) The Internet brings 77. _________ to the students and helps them save some money.
Conclusion	Though the Internet is 79. _________ the reach of every person and it is not so amicable, it will make education  80. _________ faster.